Ultrasound Image Optimization (“Knobology”):
                    B-Mode

Zander, David; Hüske, Sebastian; Hoffmann, Beatrice; Cui, Xin‐Wu; Ye, Dong; Lim, Adrian; Jenssen, Christian; Löwe, Axel; Koch, Jonas; Dietrich, Christoph F.

doi:10.1055/a-1223-1134

Cited by 53 publications

(49 citation statements)

References 38 publications

(41 reference statements)

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“…We proceeded to evaluate other patient and operative factors that might affect image quality. Weight/BMI is often a concern for block difficulty due to excess tissue that may affect the image or needle manipulation, especially as increased depth on an ultrasound necessitates a less clear image [ 10 ]. For the rest of the data reviewed, a correlation coefficient (r) and p-value (p) were calculated.…”

Section: Discussionmentioning

confidence: 99%

Predictors of Difficult Ultrasound-Guided Transversus Abdominis Plane Blocks

Bellamy

Hierlmeier

Mendez

et al. 2021

Cureus

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BackgroundFascial plane blocks are a valuable and important aspect of patient care. However, nerve blocks sometimes present with a technical difficulty that can lead to upsetting the operating room schedule, cause discomfort to the patient, or lead to inadequate block. Potential predictors of this difficulty were evaluated. MethodsIn a single-blind study, ultrasound image quality was evaluated on a grading metric, and its correlation with several factors that could potentially impact the difficulty of a procedure, including age, BMI, weight, length of surgery, IV fluids, and pre-vs postoperative block, was assessed. ResultsNo correlation was found between any of our anesthetic, patient, or surgical factors, and the resulting image quality. ConclusionThe study population was limited compared to our initial goals. We found no correlation between studied variables and image quality, but confounding factors that may affect image quality have not been ruled out.

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Section: Discussionmentioning

confidence: 99%

Predictors of Difficult Ultrasound-Guided Transversus Abdominis Plane Blocks

Bellamy

Hierlmeier

Mendez

et al. 2021

Cureus

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“…B-mode refers to an ultrasound imaging mode that provides two-dimensional ultrasound image with the brightness of each pixel indicating the amplitude of the ultrasound echo signal received by the ultrasound transducer. Diagnostic ultrasound in B-mode allows visualization and quantification of anatomical structures [ 62 ]. The tracking camera consisted of two main components: fisheye cameras and inertial measurement units.…”

Section: Methodsmentioning

confidence: 99%

Validation of Scolioscan Air-Portable Radiation-Free Three-Dimensional Ultrasound Imaging Assessment System for Scoliosis

Lai

Lee

et al. 2021

Sensors

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To diagnose scoliosis, the standing radiograph with Cobb’s method is the gold standard for clinical practice. Recently, three-dimensional (3D) ultrasound imaging, which is radiation-free and inexpensive, has been demonstrated to be reliable for the assessment of scoliosis and validated by several groups. A portable 3D ultrasound system for scoliosis assessment is very much demanded, as it can further extend its potential applications for scoliosis screening, diagnosis, monitoring, treatment outcome measurement, and progress prediction. The aim of this study was to investigate the reliability of a newly developed portable 3D ultrasound imaging system, Scolioscan Air, for scoliosis assessment using coronal images it generated. The system was comprised of a handheld probe and tablet PC linking with a USB cable, and the probe further included a palm-sized ultrasound module together with a low-profile optical spatial sensor. A plastic phantom with three different angle structures built-in was used to evaluate the accuracy of measurement by positioning in 10 different orientations. Then, 19 volunteers with scoliosis (13F and 6M; Age: 13.6 ± 3.2 years) with different severity of scoliosis were assessed. Each subject underwent scanning by a commercially available 3D ultrasound imaging system, Scolioscan, and the portable 3D ultrasound imaging system, with the same posture on the same date. The spinal process angles (SPA) were measured in the coronal images formed by both systems and compared with each other. The angle phantom measurement showed the measured angles well agreed with the designed values, 59.7 ± 2.9 vs. 60 degrees, 40.8 ± 1.9 vs. 40 degrees, and 20.9 ± 2.1 vs. 20 degrees. For the subject tests, results demonstrated that there was a very good agreement between the angles obtained by the two systems, with a strong correlation (R2 = 0.78) for the 29 curves measured. The absolute difference between the two data sets was 2.9 ± 1.8 degrees. In addition, there was a small mean difference of 1.2 degrees, and the differences were symmetrically distributed around the mean difference according to the Bland–Altman test. Scolioscan Air was sufficiently comparable to Scolioscan in scoliosis assessment, overcoming the space limitation of Scolioscan and thus providing wider applications. Further studies involving a larger number of subjects are worthwhile to demonstrate its potential clinical values for the management of scoliosis.

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“…There are numerous other sources of dimensional errors inherent to the ultrasound technology itself and its application technique. 34,35 The duplex technique used herein utilized a two-dimensional (2-D) probe for a 3-D image projected on a flat screen with the Z axis represented as layer thickness. Measurements in 2-D have been frequently observed to be smaller than 3-D measurements in a variety of other regions.…”

Section: Caliber Discrepancy Between Ivus and Duplexmentioning

confidence: 99%

Dimensional disparity between duplex and intravascular ultrasound in the assessment of iliac vein stenosis

et al. 2021

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Minimum iliac vein caliber necessary to maintain normal peripheral venous pressure can be derived by the Poiseuille equation. Duplex was compared to intravascular ultrasound (IVUS) in the assessment of iliac vein stenosis in this single center retrospective study. Parallel IVUS and duplex caliber data for common iliac vein (CIV) and external iliac vein (EIV) in 382 limbs were separately compared. One or both segments were stenotic by IVUS criteria in 213 limbs. Neither segment was stenotic by IVUS in 22 limbs. Bland–Altman analyses and Passing–Bablok linear regressions were used. Duplex calibers were dimensionally smaller than corresponding IVUS images of CIV and EIV segments in Bland–Altman comparison by a mean of 54 mm2 and 34 mm2, respectively. Passing–Bablok regression suggested the difference was due to a systematic bias and not proportional. Duplex yields a smaller cross-sectional image of CIV and EIV compared to IVUS. Duplex is not a reliable diagnostic test for iliac vein stenosis.

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Ultrasound Image Optimization (“Knobology”): B-Mode

Cited by 53 publications

References 38 publications

Predictors of Difficult Ultrasound-Guided Transversus Abdominis Plane Blocks

Predictors of Difficult Ultrasound-Guided Transversus Abdominis Plane Blocks

Validation of Scolioscan Air-Portable Radiation-Free Three-Dimensional Ultrasound Imaging Assessment System for Scoliosis

Dimensional disparity between duplex and intravascular ultrasound in the assessment of iliac vein stenosis

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